wallet: Generated migrated wallet's path from walletdir and name

Co-Authored-By: Ryan Ofsky <ryan@ofsky.org>

src/wallet/wallet.cpp

@@ -3843,16 +3843,19 @@ bool CWallet::MigrateToSQLite(bilingual_str& error)
 
     // Close this database and delete the file
     fs::path db_path = fs::PathFromString(m_database->Filename());
-    fs::path db_dir = db_path.parent_path();
     m_database->Close();
     fs::remove(db_path);
 
+    // Generate the path for the location of the migrated wallet
+    // Wallets that are plain files rather than wallet directories will be migrated to be wallet directories.
+    const fs::path wallet_path = fsbridge::AbsPathJoin(GetWalletDir(), fs::PathFromString(m_name));
+
     // Make new DB
     DatabaseOptions opts;
     opts.require_create = true;
     opts.require_format = DatabaseFormat::SQLITE;
     DatabaseStatus db_status;
-    std::unique_ptr<WalletDatabase> new_db = MakeDatabase(db_dir, opts, db_status, error);
+    std::unique_ptr<WalletDatabase> new_db = MakeDatabase(wallet_path, opts, db_status, error);
     assert(new_db); // This is to prevent doing anything further with this wallet. The original file was deleted, but a backup exists.
     m_database.reset();
     m_database = std::move(new_db);